The catalytic asymmetric aldol reaction of N-unprotected cyclic carboxyimides has been achieved. Silicon tetrachloride acts in situ as a protecting and mediating reagent and is converted to a nucleophilic species for the aldol reaction. The use of a chiral phosphine oxide catalyst can achieve enantioselective aldol reactions (up to 91/9 dr and 97/3 er) of various N-unprotected cyclic carboxyimides
已经实现了N-未保护的环状羧酰亚胺的催化不对称羟醛反应。四氯化硅在原位充当保护和中介试剂,并转化为用于醛醇反应的亲核物质。使用手性氧化膦催化剂可以实现各种N-未保护的环状羧酰亚胺(包括琥珀酰亚胺、乙内酰脲和格列酮)的对映选择性羟醛反应(高达 91/9 dr 和 97/3 er)。
THE CORRELATION OF STRUCTURE AND REACTIVITY OF AROMATIC ALDEHYDES. III.<sup>1</sup> THE CONDENSATION OF AROMATIC ALDEHYDES WITH HYDANTOIN<sup>2</sup>